BOISE, Idaho (AP) -
D.J. Harper rushed for 122 yards and a touchdown and Joe Southwick threw for another score to lead No. 24 Boise State to a 20-10 victory over Fresno State Saturday.

Harper was the leader of a Boise State (5-1, 2-0 Mountain West) rushing attack that chewed up 215 yards on the ground and propelled the Broncos to their fifth consecutive win and seventh straight over the Bulldogs.

The Boise State defense also turned in another impressive performance.

The Broncos held Fresno State scoreless in the first half, the fourth straight game the Broncos defense has held foes scoreless in the first two quarters. The defense also squelched a Bulldog scoring drive in the opening minutes of the third quarter with an interception, forced a fumble on another possession late and held Robbie Rouse to 77 yards rushing on 25 carries.

Southwick put the Broncos up in the first quarter when he fired a 10-yard touchdown to Geraldo Boldewijn, who got open on an out move in the left corner of the end zone. Southwick didn't make any big mistakes in the game, but he struggled again to turn some promising drives into touchdowns. He finished 11 of 22 for 113 yards passing and one interception.

But Boise State didn't really need him to make plays with his arm with the way Harper was finding holes in the Fresno State (4-3, 2-1) defense. Harper, who had 18 carries, put Boise State up 17-0 with 2:28 left before the half with a nifty 28-yard TD run. His counterpart Jay Ajayi added 82 yards on 14 carries. The Broncos amassed 335 total yards on offense and Boldewijn led the team with three catches for 37 yards..

Bronco kicker Michael Frisina also hit a pair of 19-yard field goals, but missed late in the game from 37-yards out.

The loss dropped the Bulldogs out of a first-place tie with Nevada and extended their losing streak against ranked teams to 16 straight.

Fresno State got on the board late in the third quarter when Quentin Breshears nailed a 39-yard field goal to pull within 20-3.

Quarterback Derek Carr and the Bulldogs' no-huddle offense moved the ball well in the second half and finally scored a touchdown late in the fourth quarter. Carr capped a nine-play, 80-yard drive by lobbing a 3-yard pass to Davante Evans.

But the Bulldogs failed to capitalize on the ensuing onside kick when Boldewijn leapt high to bat the ball out of bounds.

Carr was 29 of 43 for 266 yards, but his lone interception in Boise State territory squelched a scoring drive early in the third quarter. He was fumbled the ball while scrambling late in the fourth quarter deep in Bulldog territory.

The Bulldogs amassed 322 yards of total offense and were penalized nine times for 85 yards.